I use The Redmi Note 2 Prime 32Gb
So i found 5 things so far:
1.
The SD Card speed is slow as hell dunno why, this happened since 4 or 5 Rom Versions and it didn´t get fixed by now.
It is a real pain when you need to copy some larger files.
2.
Internet speed in Playstore, Chrome and Gmail is really slow too just 750 kb/s even with other browsers i tested, Download is limited to about 800 Kb/s
3.
Over Wifi the Push Notification doesn´t work
Whats app Gmail and so on don´t get messages.
Only if i open these apps then i get like 10 mails instant.
Wlan is set to stay connected even display is off...
I set Gmail and so on in Autostart to on
Even in Battery options i use the stay connected on gmail and other apps
In Taskmanager i locked gmail to never gets closed too
But it changes nothin as soon as i lock the Phone i didn´t get notifications anymore.
4.
In the options if i hit Wallpaper the app oppens and nothing happens
In Version 5.11.5 there was a preview of the wallpapers that are set as Background for Launcher and Lockscreen.
As you can see theres nothing now.
If i hit the Change Wallpaper ("Hintergrund auswählen" on the Picture) the screen gets black for a second and it goes back to this what you can see below. So theres no chance for me to change the Lockscreen Background.
5.
Camera the HDR Mode doesn´t work
If i find more i will tell you, hope some things get fixed as soon as possible. thx so far